From 4ee92b7c55a051a4cb050cd5fbf39e4e08398c50 Mon Sep 17 00:00:00 2001
From: Pranshu Chittora <pranshu@signoz.io>
Date: Mon, 11 Jul 2022 19:03:16 +0530
Subject: [PATCH] fix: query builder update legend on empty values (#1367)

---
 .../LeftContainer/QuerySection/QueryBuilder/promQL/index.tsx  | 4 ++--
 .../QuerySection/QueryBuilder/queryBuilder/index.tsx          | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/frontend/src/container/NewWidget/LeftContainer/QuerySection/QueryBuilder/promQL/index.tsx b/frontend/src/container/NewWidget/LeftContainer/QuerySection/QueryBuilder/promQL/index.tsx
index 1d96297d04..4dee33c779 100644
--- a/frontend/src/container/NewWidget/LeftContainer/QuerySection/QueryBuilder/promQL/index.tsx
+++ b/frontend/src/container/NewWidget/LeftContainer/QuerySection/QueryBuilder/promQL/index.tsx
@@ -30,8 +30,8 @@ function PromQLQueryContainer({
 	}: IPromQLQueryHandleChange): void => {
 		const allQueries = queryData[WIDGET_PROMQL_QUERY_KEY_NAME];
 		const currentIndexQuery = allQueries[queryIndex];
-		if (query) currentIndexQuery.query = query;
-		if (legend) currentIndexQuery.legend = legend;
+		if (query !== undefined) currentIndexQuery.query = query;
+		if (legend !== undefined) currentIndexQuery.legend = legend;
 
 		if (toggleDisable) {
 			currentIndexQuery.disabled = !currentIndexQuery.disabled;
diff --git a/frontend/src/container/NewWidget/LeftContainer/QuerySection/QueryBuilder/queryBuilder/index.tsx b/frontend/src/container/NewWidget/LeftContainer/QuerySection/QueryBuilder/queryBuilder/index.tsx
index fd5d7f32ad..5b05eeca91 100644
--- a/frontend/src/container/NewWidget/LeftContainer/QuerySection/QueryBuilder/queryBuilder/index.tsx
+++ b/frontend/src/container/NewWidget/LeftContainer/QuerySection/QueryBuilder/queryBuilder/index.tsx
@@ -55,7 +55,7 @@ function QueryBuilderQueryContainer({
 			currentIndexQuery.aggregateOperator = aggregateFunction;
 		}
 
-		if (metricName) {
+		if (metricName !== undefined) {
 			currentIndexQuery.metricName = metricName;
 		}